Tag Archives: server

Empty InputStream with Spring MVC

Posted on January 6, 2017 by Matthias

The other day, I was trying to build a simple batch upload interface for a Java web application running Spring Boot with Spring MVC on Apache Tomcat. But when I tried reading the InputStream in my controller, it was always empty. … Continue reading →

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Detecting Security Upgrades on Ubuntu

Posted on October 22, 2016 by Matthias

In my article on unattended upgrades I described how to set up an Ubuntu system to install security upgrades automatically. This is convenient for small setups, but in an enterprise environment you typically want to perform some QA before applying the … Continue reading →

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Detecting HTTP/2 Support

Posted on August 27, 2016 by Matthias

Thanks to Ubuntu 16.04 which includes a fairly recent Nginx version, I have now enabled HTTP/2 on my private server. Of course, I also wanted to verify whether my configuration change had any effect – after all, there is no visible change … Continue reading →

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Migrating to HTTPS

Posted on June 5, 2016 by Matthias

There’s more to migrating a complex site to HTTPS than just enabling TLS in your web server or reverse proxy. All links to embedded resources like style sheets, images, or scripts need to be served via HTTPS and potentially have … Continue reading →

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Let’s Use TLS

Posted on January 17, 2016 by Matthias

I have followed the HTTP/2 specification process closely and I like how the new protocol improves web performance and makes old workarounds obsolete. One drawback of deploying HTTP/2 is that most browser vendors only implement it on top of TLS. Since … Continue reading →

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Keeping Your Server Secure With Unattended Upgrades

Posted on February 26, 2015 by Matthias

When operating servers, you’re responsible for keeping them up to date with the latest security fixes. Ubuntu comes with a mechanism that installs updates automatically so you don’t have to worry about it. Obviously, this is meant for personal servers … Continue reading →

Posted in linux | Tagged , , , | 9 Comments

Simple Web Services With Bottle

Posted on June 9, 2012 by Matthias

Recently I rediscovered Bottle, a Python-based micro framework for web applications. Bottle gives you full control over your URLs, has a simple built-in templating engine and a lot of other commonly used stuff. It takes you five minutes to get … Continue reading →

Posted in python | Tagged , , , | 2 Comments

“Cannot fork”

Posted on September 4, 2011 by Matthias

From time to time, the virtual server I rented acted up. When logging into the system, I would get error messages indicating the server wasn’t able to create any more processes: “cannot fork”. This was weird because ps(1) showed only … Continue reading →

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